correct format of per PPI family best activity

to display only 2 decimals (see #251)

ippisite/ippidb/templates/compound_l_item.html

@@ -71,7 +71,7 @@
         {% for row in compound.get_target_activities_table %}
         <tr>
           <td scope="col">{{ row.family.name }}</td>
-          <td scope="col">{{ row.best_activity }}</td>
+          <td scope="col">{{ row.best_activity|floatformat:2 }}</td>
           <td scope="col">
             {% for disease in row.diseases %}
             {{ disease.name }}